Meanings
adjectivesolid as a rock (not comparable)
- not comparablesimileExtremely thick and heavy, so as to make it impossible to move.
We're not going to be able to break down this door: it's solid as a rock.
Synonyms: rock solid
- not comparablesimileVery reliable and dependable
Stewart has been solid as a rock ever since becoming the new vice-chairman.
Synonyms: rock solid
Synonyms & antonyms
adjectiveExtremely thick and heavy, so as to make it impossible to move.
Similar
adjectiveVery reliable and dependable
Similar
Also see
Cite this entry
APA
solid as a rock. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/solid%20as%20a%20rock
MLA
“solid as a rock.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/solid%20as%20a%20rock. Accessed November 5, 2026.
Chicago
WatkinsX Dictionary, s.v. “solid as a rock,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/solid%20as%20a%20rock.
Source: solid as a rock on Wiktionary, CC BY-SA 4.0.